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Positioning the circles before the first turn of the flocculator caused a periodic vortex shedding and variation of the turbulent energy dissipation with time in the flow around the turn that persisted and repeated in the 20 sec simulation.
Variation of Turbulent Kinetic Energy Dissipation with time (scale is too .005 m^2/ s^3)
Positioning the circle and the plate before the first turn decreased the energy dissipation zone after the first turn.
Time step intervals (scale is .01 m^2/s^3)